Hello, RobRoo. Perhaps you would get quicker responses if you gave us some more information to help us figure out what is wrong. If you answer the questions in the sticky at the top of this section called "Have an Emergency / Disease? Please read first", that would help. I copied and pasted the questions below for you.

1) What type of bird , age and weight (does the chicken seem or feel lighter or thinner than the others.)
2) What is the behavior, exactly.
3) How long has the bird been exhibiting symptoms?
4) Are other birds exhibiting the same symptoms?
5) Is there any bleeding, injury, broken bones or other sign of trauma.
6) What happened, if anything that you know of, that may have caused the situation.
7) What has the bird been eating and drinking, if at all.
8) How does the poop look? Normal? Bloody? Runny? etc.
9) What has been the treatment you have administered so far?
10 ) What is your intent as far as treatment? For example, do you want to treat completely yourself, or do you need help in stabilizing the bird til you can get to a vet?
11) If you have a picture of the wound or condition, please post it. It may help.
12) Describe the housing/bedding in use.